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Palaeoenvironment of the Barents Sea since the Last Glacial Maximum

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Title
Palaeoenvironment of the Barents Sea since the Last Glacial Maximum
Other Titles
마지막최대빙하기 이후 바렌츠해의 고환경 연구
Authors
Lim, Hyounsoo
Lee, Jae Il
Yoon, Ho Il
Yoo, Kyu-Cheul
Keywords
Barents; Holocene; Last Glacial Maximum; paleoenvironment
Issue Date
2007
Citation
Lim, Hyounsoo, et al. 2007. Palaeoenvironment of the Barents Sea since the Last Glacial Maximum. University of Tromso. University of Tromso. 2007.11.12~.
Abstract
The palaeoenvironment of the Barents Sea and adjacent area since the Last Glacial Maximum (LGM) was reconstructed on fourteen gravity cores retrieved during a Korea-Russia joint cruise in 2002-2004. The Barents Sea sediments were classified into nine sedimentary facies: massive dark gray diamicton during the LGM
stratified dark gray diamicton, (light) olive gray clay, and light brownish (sandy) mud during the last deglaciation
and greenish gray mud, laminated greenish gray clay and mud, (cross-stratified) olive gray muddy sand, greenish gray sandy mud, and brownish mud during the Holocene. The grain size distribution, total organic carbon and total nitrogen contents, and the carbonate content for all the cores were analyzed at 2-4cm intervals. The depositional age was determined by AMS radiocarbon isotope dating on shell fragments. Sedimentological and geochemical analyses reveal that during the LGM, the Barents Ice Sheet had not developed over the Saint Anna Trough eastward. Early Holocene sedimentation in the Barents Sea is characterized by a high sedimentation rate accompanied by a rapid relative sea level rise. Cyclic sedimentation in a periodical anoxic environment occurred in the Pechora Sea. The sedimentation rate in the Barents Sea has decreased since 7-8 ka with a slowdown of the relative sea level rise, and coarse-grained sediment was deposited in the Pechora and southeastern Barents seas. A decrease in the sedimentation rate since the middle Holocene resulted in the formation of an oxidation crust in trough regions.
URI
http://repository.kopri.re.kr/handle/201206/7735
Conference Name
University of Tromso
Conference Place
University of Tromso
Conference Date
2007.11.12~
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